Induction-Heated Water Duct for Fast Beverage Flow Without Limescale
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Solution Overview
Problem
Existing beverage machines face challenges in rapidly heating water to high temperatures with high flow rates while minimizing energy consumption and maintenance costs, as well as dealing with limescale deposition in heating pipes, which leads to inefficiencies and increased maintenance needs.
Innovation Solution
A device with a metal duct for water flow and a winding of electromagnetic induction, where the duct and spool are physically separated, allowing for easy replacement and maintenance, and using high-frequency electromagnetic induction to heat water efficiently while preventing limescale deposition through ultrasound vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heating element is permanently dipped in water to heat it, then the water can be heated to desired temperature, but energy consumption increases significantly when the machine is not operating
Solution Approach 1:
The heating element is made movable rather than permanently fixed, allowing it to be inserted into or removed from the water tank dynamically. This enables the system to heat water only when needed and avoids continuous energy consumption during idle periods, resolving the contradiction between maintaining temperature readiness and reducing energy waste.
2Productivity
If a high flow rate of hot water is fed to satisfy beverage requirements, then the beverage can be prepared quickly, but the temperature of water in the tank decreases rapidly
Solution Approach 1:
The heating element can be pre-positioned or pre-heated before water is needed, allowing rapid heating response when high flow rate is required. This preliminary preparation ensures that even with high flow rates, the water temperature can be maintained or quickly restored, resolving the contradiction between productivity and temperature stability.
3Speed
If a winding of electromagnetic induction is wound directly around a heating pipe, then water can be heated rapidly, but limescale deposits form inside the pipe
Solution Approach 1:
The heating system is segmented into separate functional components: the electromagnetic induction winding is separated from the water-contacting heating pipe. This segmentation allows the winding to perform rapid heating without being in direct contact with water, thereby preventing limescale deposition while maintaining high heating speed through the intermediate heating element.
4Device complexity
If the heating element is permanently integrated into the water tank, then the heating system is simple, but replacement and maintenance become complex and expensive
Solution Approach 1:
The heating element is designed as a separable, modular component that can be independently removed from the water tank. This segmentation maintains relative system simplicity while enabling easy replacement and maintenance of the heating element without disassembling the entire water tank or associated components, resolving the contradiction between integration simplicity and maintenance ease.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables rapid heating of water to over 75°C with flow rates greater than 10 cc/s, reduces energy consumption, and simplifies maintenance by allowing separate replacement of the duct and winding, while preventing limescale buildup through ultrasound, thus improving operational efficiency and reducing maintenance costs.
Implementation Method 1
at least one winding of electromagnetic induction, characterized in that the loops of said winding are wound around a spool made of an electrically insulating material
Implementation Method 2
the eddy currents dissipate energy, because of Joule effect, in form of warmth heating the conductive element and consequently the water contacting therewith
Implementation Method 3
an inner coating of limescale will form that, at the beginning, limits the heat conduction from the pipe towards the water and, successively, will be able to block the inside of the heating pipe
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A device for heating water in a machine for making and dispensing beverages, comprising at least one heating metallic duct and a winding of electromagnetic induction. The device is part of a heating and feeding assembly wherein, by a logical unit, it is possible to carry out a method in which, for every beverage type the machine can dispense, the temperature of heated water is led to a specific temperature value that can be selected by the user.